如何避免重複列表中的相同衛星信息？

Question

我創建了一個簡單的應用程序來顯示GPS傳感器衛星信息。 信息顯示爲文本和列表永不停止更新相同的重複信息。 我如何保持獨特的衛星信息？不重複相同的信息。

public void onGpsStatusChanged() { 

    GpsStatus gpsStatus = locationManager.getGpsStatus(null); 
    if(gpsStatus != null) { 
     Iterable<GpsSatellite>satellites = gpsStatus.getSatellites(); 
     Iterator<GpsSatellite>sat = satellites.iterator(); 
     int i=0; 
     while (sat.hasNext()) { 
      GpsSatellite satellite = sat.next(); 
      strGpsStats+= (i++) + ": " + "Pseudo-random number for the satellite: "+satellite.getPrn() + "," + "Satellite was used by the GPS calculation: " + satellite.usedInFix() + "," + "Signal to noise ratio for the satellite: "+satellite.getSnr() + "," + "Azimuth of the satellite in degrees: "+satellite.getAzimuth() + "," +"Elevation of the satellite in degrees: "+satellite.getElevation()+ "\n\n"; 
     } 

     Satinfos.setText(strGpsStats); 
    } 
} 

Answer 1

我覺得你的問題是，你不清除每個調用onGpsStatusChanged之間strGpsStats;雖然不確定，因爲你的問題不是很清楚。試試這個：

public void onGpsStatusChanged() { 
    strGpsStats = ""; 
    GpsStatus gpsStatus = locationManager.getGpsStatus(null); 
    if(gpsStatus != null) { 
     Iterable<GpsSatellite>satellites = gpsStatus.getSatellites(); 
     Iterator<GpsSatellite>sat = satellites.iterator(); 
     int i=0; 
     while (sat.hasNext()) { 
      GpsSatellite satellite = sat.next(); 
      strGpsStats+= (i++) + ": " + "Pseudo-random number for the satellite: "+satellite.getPrn() + "," + "Satellite was used by the GPS calculation: " + satellite.usedInFix() + "," + "Signal to noise ratio for the satellite: "+satellite.getSnr() + "," + "Azimuth of the satellite in degrees: "+satellite.getAzimuth() + "," +"Elevation of the satellite in degrees: "+satellite.getElevation()+ "\n\n"; 
     } 

     Satinfos.setText(strGpsStats); 
    } 
} 

Answer 2

進入while後，需要檢查重複信息。

while (sat.hasNext()) { 
      GpsSatellite satellite = sat.next(); 
      if(sat.Current != sat.next) 
{ 
      strGpsStats+= (i++) + ": " + "Pseudo-random number for the satellite: "+satellite.getPrn() + "," + "Satellite was used by the GPS calculation: " + satellite.usedInFix() + "," + "Signal to noise ratio for the satellite: "+satellite.getSnr() + "," + "Azimuth of the satellite in degrees: "+satellite.getAzimuth() + "," +"Elevation of the satellite in degrees: "+satellite.getElevation()+ "\n\n"; 
     } 
}